Toni Petrova focused on enhancing the security of the openmfp/portal-ui-lib repository by addressing a Cross-Site Scripting vulnerability in the navigation header. She implemented a solution in JavaScript and TypeScript to sanitize user-generated names, ensuring that potentially malicious HTML content could not be rendered. To validate this fix, Toni developed targeted automated tests, demonstrating her skills in front end development, security, and testing. Her work improved the code quality and strengthened the security posture of a UI library used across multiple applications. Although she did not deliver new features, her contribution addressed a critical security concern with depth and precision.